brown the ground beef along with the chopped onion and drain any fat left in the pan - If you use sirloin, there won't be that much to drain

Add broth, soup and 1/2 cup of the milk - mix well. A whisk works well in this case

Cover and heat to boiling

Reduce heat to a low boil

Add the noodles, sour cream and mushrooms - stir in and cover

Cook until noodles are tender (about 10 minutes)

Add the rest of the milk and mix in

Serving suggestion - Serve with warm bread slices